It is a Rack of Pork at about 6lbs. your right 190 probably will dry it out. I have family that like well done meat so I guess I could use the WSM to about 140. Remove rest and slice. Then sear the cuts to meet their individual needs.

I stock up on those since Costco only carries them for the holidays.
Like you said, take it to 140 then rest, slice and grill for more doneness.
I like to roast slow, rest and then sear like my prime rib.